Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
dang xay » dang van, van xay
trung ha » trung hoc, trung tam, trung cap
trung va » truong va, trang va, trung tam
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
xay hoi » xa hoi, tay hoi, cay phoi
ty dang » ty xang, ky dang, ty hang
va cao » va cac, va co, va dao
va cam » va cham, va cac, va cai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty dang xay hoi. hieu ((va cam) or (va cao)) ((trung va) OR (trung ha)) thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty dang xay hoi. hieu ((va cam) OR (va cao)) ((trung va) OR (trung ha)) thanh dai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty dang xay hoi. hieu ((va cam) or (va cao)) ((trung va) OR (trung ha)) thanh dai cua tre*".